/* 
 * [New BSD License (BSD 3-Clause License)]
 * Copyright (c) 2012, Max Bechtold
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     - Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     - Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     - Neither the name of the Rel2Xml Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package maxbe.rel2xml.generator.dml.predicates;

import java.util.ArrayList;
import java.util.List;

public class Disjunction implements Predicate {

	private List<Predicate> predicates;

	public Disjunction() {
		predicates = new ArrayList<Predicate>();
	}

	public void addPredicate(Predicate predicate) {
		predicates.add(predicate);
	}

	public List<Predicate> getPredicates() {
		return predicates;
	}

	@Override
	public String toXQuery() {
		return toXQuery(false);
	}

	@Override
	public String toXQuery(boolean omitAliases) {
		String result = "";

		for (Predicate predicate : predicates) {
			if (!(predicate instanceof ColumnComparison)
					|| !((ColumnComparison) predicate).isOmit())
				result += predicate.toXQuery(omitAliases) + " or ";
		}
		return (result.isEmpty() ? result : '(' + result.substring(0,
				result.length() - 4) + ')');
	}

	@Override
	public String toSql() {
		String result = "(";

		for (Predicate predicate : predicates) {
			result += predicate.toSql() + " or ";
		}
		return result.substring(0, result.length() - 5) + ')';
	}

	@Override
	public String toString() {
		return toSql();
	}

}
